Kootenai River White Sturgeon Investigations and Experimental Culture, 1989-1990 Annual Report.

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Description

Setline and angling techniques were used to sample 332 sturgeon from the river between Kootenai Falls and Kootenay Lake during 1989 and 1990. Sturgeon were found in Montana within 4 km of Kootenai Falls and downstream from Bonners Ferry, Idaho to Kootenay Lake, British Columbia. Our data indicate there is a complete lack of recruitment of juveniles into the population. The youngest fish sampled was of the 1977 year class, and the population is estimated at 880 individuals with 95% confidence intervals of 638 to 1,211. Culture of one pair of sturgeon in 1990 was of limited success. Less than ... continued below

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73 pages

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Apperson, Kimberly A. & Anders, Paul J. October 1, 1991.

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Description

Setline and angling techniques were used to sample 332 sturgeon from the river between Kootenai Falls and Kootenay Lake during 1989 and 1990. Sturgeon were found in Montana within 4 km of Kootenai Falls and downstream from Bonners Ferry, Idaho to Kootenay Lake, British Columbia. Our data indicate there is a complete lack of recruitment of juveniles into the population. The youngest fish sampled was of the 1977 year class, and the population is estimated at 880 individuals with 95% confidence intervals of 638 to 1,211. Culture of one pair of sturgeon in 1990 was of limited success. Less than 5% of eggs hatched with 50% initial mortality of fry. The contribution of contaminants found in eggs (aluminum, copper, zinc, lead, and organochlorides) toward this poor survival is unknown. Handling problems with the eggs at the time of spawning complicated our results. An ongoing sonic telemetry study has revealed definite long distance movements. Sturgeon regularly move across the British Columbia-Idaho border and seek out deep holes or migrate to Kootenay Lake during late fall. Seasonal differences in use of depth and velocity parameters were found between sexes and among seasons. No relationships were found between sturgeon movement and month, water temperature, flow, and flow change. However, multiple regression analysis indicated that up to 30% of the variance in individual sturgeon movement was explained by the combination of the four variables.

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73 pages

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  • Report No.: DOE/BP-93497-2
  • Grant Number: 1988BP93497
  • DOI: 10.2172/878241 | External Link
  • Office of Scientific & Technical Information Report Number: 878241
  • Archival Resource Key: ark:/67531/metadc878255

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  • October 1, 1991

Added to The UNT Digital Library

  • Sept. 21, 2016, 2:29 a.m.

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  • Feb. 20, 2017, 1:57 p.m.

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Apperson, Kimberly A. & Anders, Paul J. Kootenai River White Sturgeon Investigations and Experimental Culture, 1989-1990 Annual Report., report, October 1, 1991; Idaho. (digital.library.unt.edu/ark:/67531/metadc878255/: accessed August 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.